Question

P1168, P1051 on a 2004 Nissan Quest 2004 what are they?

Answer 1

Both codes are for the a/f sensor heater on bank 1. this is the bank closest to the firewall and the sensor is located in the exhaust manifold.Normally replacing the sensor will resolve the problem.

Answer 2

P1168 NISSAN - Closed Loop Control Function Bank 2
Read more: https://www.autocodes.com/p1168_nissan.html

P1051 NISSAN - Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2
Read more: https://www.autocodes.com/p1051_nissan.html